12867521394 has 32 divisors (see below), whose sum is σ = 31673900160. Its totient is φ = 3393631872.

The previous prime is 12867521389. The next prime is 12867521399. The reversal of 12867521394 is 49312576821.

12867521394 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12867521389) and next prime (12867521399).

It is not an unprimeable number, because it can be changed into a prime (12867521399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11782899 + ... + 11783990.

It is an arithmetic number, because the mean of its divisors is an integer number (989809380).

Almost surely, 2^12867521394 is an apocalyptic number.

12867521394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12867521394 is an abundant number, since it is smaller than the sum of its proper divisors (18806378766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12867521394 is a wasteful number, since it uses less digits than its factorization.

12867521394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23566914.

The product of its digits is 725760, while the sum is 48.

The spelling of 12867521394 in words is "twelve billion, eight hundred sixty-seven million, five hundred twenty-one thousand, three hundred ninety-four".